Question

2×(a×7-200)÷10=30 afla pe a​

Answer 1

2*(a*7-200):10=30

2*(a*7-200)=300

a*7-200=150

a*7=350

a=50

Answer 2

2 × ( a × 7 - 200 ) : 10 = 30

2 × ( a × 7 - 200 ) = 30 × 10

2 × ( a × 7 - 200 ) = 300

a × 7 - 200 = 300 : 2

a × 7 - 200 = 150

a × 7 = 150 + 200

a × 7 = 350

a = 350 : 7

a = 50